Hello,
Thanks for posting your query at DoctorSpring.com
I think it is likely to be a boil.
This is like a pimple that occurs on other parts of your body.
It is an infection / inflammation of the hair follicles in this area.
Generally, it disappears on its own in a few days.
It is precipitated by shaving, epilation or other forms of hair removal, rubbing during sex, touching the nails while masturbating or otherwise etc.
Right now, avoid touching the area.
Keep it clean.
There is no need to use special cleansers, soap, gels, douches etc.
Just clean with lukewarm water and pat dry.
Have protected sex till this clears.
Give it a week, and if it persists / reappears , you might need to see your doctor to have a prescription for antibiotics.
You can easily wait for a couple of weeks till you reach home.
Meanwhile, if you can upload photos of the area, then I can be more sure of what it actually is.
All the best.
Please feel free to discuss further.